It’s either the most exciting technology product of recent years, or the 21st Century equivalent of the Sinclair C5.

It promises to reshape our relationship with the online world – or turn us all into cyborgs, invading each other’s privacy with careless abandon. Say what you like about Google Glass, it’s certainly proved a talking point.

I’ve spent the last 24 hours trying out Google’s wearable computing device, talking to people who are developing apps for it, and gauging the reaction of onlookers.